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                ### 1.1.5 什么是狀態 Flutter中的狀態和React中的狀態概念一致。React的核心思想是組件化的思想,應用由組件搭建而成,而組件中最重要的概念是State(狀態),State是一個組件的UI數據模型,是組件渲染時的數據依據。Flutter程序的運行可以認為是一個巨大的狀態機,用戶的操作、請求API和系統事件的觸發都是推動狀態機運行的觸發點,觸發點通過調用setState方法推動狀態機進行響應。狀態的生命周期如圖1-3所示。 ![](https://box.kancloud.cn/f9ea7c2ff2c7ecb4cc381a20aba1160a_647x341.jpeg) 圖1-3 狀態的生命周期
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                              哎呀哎呀视频在线观看